mineral

Milky quartz

Quartz (silicon dioxide, SiO₂)

AI-generated identification · may be incorrect

Typically white to translucent with a vitreous luster and irregular fracture; hardness 7 Mohs, no cleavage, hexagonal crystal structure, and specific gravity about 2.65. The specimen appears naturally rough and translucent, though exact identification from the image is limited.

Identified August 17, 2026More mineral →

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Physical properties

Formation & geological history

Forms when silica-rich fluids crystallize in veins, cavities, and igneous or metamorphic rocks. Quartz is common throughout geologic time and occurs in rocks ranging from ancient Precambrian terrains to modern hydrothermal deposits.

Uses & applications

Used in glass, ceramics, engineered stone, abrasives, electronics, and construction aggregate; attractive pieces are sold as inexpensive mineral specimens.

Geological facts

Milky appearance results from microscopic fluid inclusions, fractures, or structural defects that scatter light. Quartz is one of Earth’s most abundant and chemically resistant minerals.

Field identification & locations

Identify by its glassy luster, lack of cleavage, conchoidal or uneven fracture, and ability to scratch ordinary glass; common localities include Brazil, Madagascar, the United States, and worldwide quartz veins.